Increasing and decreasing pH to enhance the biological activity of nicosulfuron

Weed Technology

Volumn 19, Issue 2, 2005, Pages 468-475

  Green, Jerry M ^b   Hale, Theresa ^a  

^a DUPONT COMPANY   (United States)

^b NONE

Author keywords

Acid; Adjuvant; Base; Basic blend; Buffer; Formulation; Hydrophilic lipophilic balance; Nicosulfuron; Nonionic surfactant; Phosphoric acid; Potassium phosphate; Sulfonylurea; Water dispersible granule; Weak acid

Indexed keywords

BIOACTIVITY; HERBICIDE; PH; PHOSPHATE GROUP; SOLUBILITY; SURFACTANT; WEED;

DIGITARIA SANGUINALIS;

EID: 30644478989     PISSN: 0890037X     EISSN: None     Source Type: Journal    
DOI: 10.1614/WT-04-001R5     Document Type: Article

References (28)

1. Fahl, G. M., L. Kreft, R. Altenburger, M. Faust, W. Boedeker, and L. H. Grimme. 1995. pH-dependent sorption, bioconcentration and algal toxicity of sulfonylurea herbicide. Aquat. Toxicol. 31:175-187.
2. Franz, R. E., M. K. Mao, and J. A. Sikorski. 1997. Glyphosate: A Unique Global Pesticide. Washington, DC: American Chemical Society. 653 p.
3. Green, J. M. 1999. Effect of nonylphenol ethoxylation on the biological activity of three herbicides with different water solubilities. Weed Technol. 13:840-842.
4. Green, J. M. and W. R. Cahill. 2003a. Enhancing the biological activity of nicosulfuron with silicone adjuvant and pH adjusters. In G. Volgas, R. Downer, and H. Lopez, eds. Pesticide Formulations and Application Systems: Surviving Change in the Agrochemical Industry. Volume 23. West Conshohocken, PA: American Society for Testing Materials. Pp. 115-124.
5. Green, J. M. and W. R. Cahill. 2003b. Enhancing nicosulfuron activity with pH adjusters. Weed Technol. 17:338-345.
6. Griffin, W. C. 1954. Calculation of HLB of non-ionic surfactants. J. Soc. Cosmet. Chem. 5:249-258.
7. Hall, G. J., C. A. Hart, and C. A. Jones. 2000. Plants as sources of cations antagonistic to glyphosate activity. Pest Manag. Sci. 56:351-358.
8. Harr, J., R. Guggenheim, G. Schulke, and R. H. Falk. 1991. The Leaf Surface of Major Weeds. Sandoz Agro, Ltd. Witerswil, Switzerland: Fricker. 131 p.
9. Hartzler, R. M. 2003. Absorption of Foliar-Applied Herbicides. Web page: http://www.weeds.iastate.edu/mgmt/2001/absorp.htm. Accessed: October 2, 2003.
10. Hess, F. D. and C. L. Foy. 2000. Interaction of surfactants with plant cuticles. Weed Technol. 14:807-813.
11. Holmberg, K., B. Jönsson, B. Kronberg, and B. Lindman. 2003. Surfactants and polymers in aqueous solution. 2nd ed. Chichester, UK: J. Wiley. 545 p.
12. Liu, Z. Q. 2002. Lower formulation pH does not enhance bentazone uptake into plant foliage. N. Z. Plant Prot. 55:163-167.
13. Liu, Z. Q. and R. E. Gaskin. 2004. Visualisation of the uptake of two model xenobiotics in bean leaves by confocal laser scanning microscopy: diffusion pathways and implication in phloem translocation. Pest Manag. Sci. 60:434-439.
14. Liu, Z. Q., R. E. Gaskin, and J. A. Zabkiewicz. 2004. Visualization of the effect of surfactant on the uptake of zenobiotics into plant foliate by confocal laser scanning microscopy. Weed Res. 44:237-243.
15. Molin, W. T. and K. Hirase. 2004. Comparison of commercial glyphosate formulations for control of prickly side, purple nutsedge, morningglory, and sicklepod. Weed Biol. Manag. 4:136-141.
16. Muir, R. M. and C. Hansch. 1955. Chemical constitution as related to growth regulator action. Annu. Rev. Plant Physiol. 6:157-176.
17. Nalewaja, J. D. and R. Matysiak. 2000. Spray deposits from nicosulfuron with salts that affect efficacy. Weed Technol. 14:740-749.
18. Nalewaja, J. D., R. Matysiak, and Z. Woznica. 1997. Adjuvants for herbicidal compositions. U.S. Patent No. 5,658,855.
19. Parrish, S. K., R. A. Beardmore, and A. E. Herold. 2003. Herbicide compositions comprising compound in acid form and acidifying agent. U.S. Patent Appl. No. 153461.
20. Roberts, J. R., J. Thomas, and G. C. Volgas. 2002. Composition used as herbicide comprises glyphosate in free acid form and acid component e.g. phosphoric acid and/or neutralized organic acid. U.S. Patent Appl. No. 039970.
21. Russell, M. H., J. L. Saladini, and F. Lichtner. 2002. Sulfonylurea herbicides. Pestic. Outlook 13:166-173.
22. [SAS] Statistical Analysis Systems. 2000. SAS User's Guide. Version 8.1. Cary, NC: Statistical Analysis Systems Institute. 1686 p.
23. Stirling, T. M. 1994. Mechanisms of herbicide absorption across plant membranes and accumulation in plant cells. Weed Sci. 43:263-276.
24. Stock, D. J. and P. J. Holloway. 1993. Possible mechanisms for surfactant-induced foliar uptake of agrochemicals. Pestic. Sci. 38:165-177.
25. Streibig, J. C., M. Rudemo, and J. E. Jensen. 1993. Dose-response curves and statistical models. In J. C. Streibig and P. Kudsk, eds. Herbicide Bioassays. Boca Raton, FL: CRC. Pp. 30-55.
26. U.S. Government. 1987. Code of Federal Regulations, Title 40, Subchapter E, Part 180, Subpart D-180.1001. Washington, DC: U.S. Government Printing Office.
27. Volgas, G. C. and J. R. Roberts. Benefits of a 2,4-D acid formulation. In H. Lopez, G. Volgas, and M. Salyani, eds. Pesticide Formulations and Application Systems. Volume 24. ASTM STP 1483. West Conshohocken, PA: American Society for Testing and Materials. In press.
28. Woznica, Z., J. D. Nalewaja, and C. G. Messersmith. 2001. Sulfosulfuron efficacy is affected by surfactants, pH of spray mixtures, and salts. In J. C. Mueninghoff, A. K. Viets, and R. A. Downer, eds. Pesticide Formulations and Application Systems: A New Century for Agricultural Formulations. Volume 21. ASTM STP 1414. West Conshohocken, PA: American Society for Testing and Materials. Pp. 11-22.